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Henry Gellibrand

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Henry Gellibrand (1597–1637) was an English mathematician. He is known for his work on the Earth's magnetic field. He discovered that magnetic declination – the angle of dip of a compass needle – is not constant but changes over time. He announced this in 1635, relying on previous observations by others, which had not yet been correctly interpreted.

He was the son of the physician Henry Gellibrand (1568–1615) and Mary Faversham. His four younger brothers were John, Edward, Thomas and Samuel. Samuel Gellibrand became a prominent seventeenth-century London bookseller.

He also devised a method for measuring longitude, based on eclipses. The mathematical tables of Henry Briggs, consisting of logarithms of trigonometric functions, were published by Gellibrand in 1633 as ''Trigonometria Britannica''.

He was Professor at Gresham College, succeeding Edmund Gunter in 1626. He was buried in St Peter le Poer, a London church that was demolished in 1907. Provided by Wikipedia

Henry Gellibrand

An epitome of navigation containing the doctrin of plain & spherical triangles, and their use and application in plain sailing, mercator's sailing, and great circle sailing ... : t... by Gellibrand, Henry, 1597-1636

An epitome of the art of navigation Containing the doctrine of plain and spherical triangles, ... Together with tables of the sun and stars ... And the logarithm sines and tangents... by Gellibrand, Henry, 1597-1636

An epitome of the art of navigation Containing the doctrine of plain and spherical triangles, ... Together with tables of the sun and stars ... And the logarithm sines and tangents... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing the doctrine of plain and spherical triangles ... Together with tables of the sun and stars ... And the logarithm sines and tangents, ... by Hen... by Gellibrand, Henry, 1597-1636

An institution trigonometricall. Wherein demonstratively and perspicuously is exhibited the doctrine of the dimension of plain and spherical triangles : after the most exact and co... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing problems geometrical, the doctrine of plain and spherical triangles, and their application in plain, mercator and great circle sailing : as also... by Gellibrand, Henry, 1597-1636

A discovrse mathematical on the variation of the magneticall needle together with its admirable diminution lately discovered / by Henry Gellibrand. by Gellibrand, Henry, 1597-1636

An epitome of navigation containing the doctrine of plain and spherical triangles, and their use and application in plain sailing, mercator's sailing, and great circle sailing, as... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing the doctrin of plain & spherical triangles, and their use and application in plain sailing, mercator's sailing, and great circle sailing ... : t... by Gellibrand, Henry, 1597-1636

A discourse mathematical on the variation of the magneticall needle Together with its admirable diminution lately discovered. By Henry Gellibrand professor of astronomie in Gresham... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing problems geometrical, the doctrine of plain and spherical triangles, and their application in plain, mercator and great circle sailing : as also... by Gellibrand, Henry, 1597-1636

An institution trigonometricall VVherein demonstratively and perspicuously is exhibited the doctrine of the dimension of plain and sphericall triangles after the most exact and com... by Gellibrand, Henry, 1597-1636

An institution trigonometricall. Wherein demonstratively and perspicuously is exhibited the doctrine of the dimension of plain and spherical triangles : after the most exact and co... by Gellibrand, Henry, 1597-1636

An institution trigonometricall VVherein demonstratively and perspicuously is exhibited the doctrine of the dimension of plain and sphericall triangles after the most exact and com... by Gellibrand, Henry, 1597-1636

A discourse mathematical on the variation of the magneticall needle Together with its admirable diminution lately discovered. By Henry Gellibrand professor of astronomie in Gresham... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing the doctrine of plain and spherical triangles, and their use and application in plain sailing, mercator's sailing, and great circle sailing, as... by Gellibrand, Henry, 1597-1636

Epitomy of navigation Containing plain and easy rules, for the working all plain triangles, and their application to plain, traverse, oblique, Mercator and middle latitude sailing;... by Gellibrand, Henry, 1597-1636

Trigonometria Britanica, or, The doctrine of triangles in two books : the first of which sheweth the construction of the naturall and artificiall sines, tangents and secants, and t... by Newton, John, 1622-1678

Trigonometria Britanica, or, The doctrine of triangles in two books : the first of which sheweth the construction of the naturall and artificiall sines, tangents and secants, and t... by Newton, John, 1622-1678

The strange and dangerous voyage of Captaine Thomas Iames, in his intended discouery of the Northwest Passage into the South Sea VVherein the miseries indured both going, wintering... by James, Thomas, 1593?-1635?

Search Results - Gellibrand, Henry, 1597-1636

Henry Gellibrand

An epitome of navigation containing the doctrin of plain & spherical triangles, and their use and application in plain sailing, mercator's sailing, and great circle sailing ... : t... by Gellibrand, Henry, 1597-1636

An epitome of the art of navigation Containing the doctrine of plain and spherical triangles, ... Together with tables of the sun and stars ... And the logarithm sines and tangents... by Gellibrand, Henry, 1597-1636

An epitome of the art of navigation Containing the doctrine of plain and spherical triangles, ... Together with tables of the sun and stars ... And the logarithm sines and tangents... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing the doctrine of plain and spherical triangles ... Together with tables of the sun and stars ... And the logarithm sines and tangents, ... by Hen... by Gellibrand, Henry, 1597-1636

An institution trigonometricall. Wherein demonstratively and perspicuously is exhibited the doctrine of the dimension of plain and spherical triangles : after the most exact and co... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing problems geometrical, the doctrine of plain and spherical triangles, and their application in plain, mercator and great circle sailing : as also... by Gellibrand, Henry, 1597-1636

A discovrse mathematical on the variation of the magneticall needle together with its admirable diminution lately discovered / by Henry Gellibrand. by Gellibrand, Henry, 1597-1636

An epitome of navigation containing the doctrine of plain and spherical triangles, and their use and application in plain sailing, mercator's sailing, and great circle sailing, as... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing the doctrin of plain & spherical triangles, and their use and application in plain sailing, mercator's sailing, and great circle sailing ... : t... by Gellibrand, Henry, 1597-1636

A discourse mathematical on the variation of the magneticall needle Together with its admirable diminution lately discovered. By Henry Gellibrand professor of astronomie in Gresham... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing problems geometrical, the doctrine of plain and spherical triangles, and their application in plain, mercator and great circle sailing : as also... by Gellibrand, Henry, 1597-1636

An institution trigonometricall VVherein demonstratively and perspicuously is exhibited the doctrine of the dimension of plain and sphericall triangles after the most exact and com... by Gellibrand, Henry, 1597-1636

An institution trigonometricall. Wherein demonstratively and perspicuously is exhibited the doctrine of the dimension of plain and spherical triangles : after the most exact and co... by Gellibrand, Henry, 1597-1636

An institution trigonometricall VVherein demonstratively and perspicuously is exhibited the doctrine of the dimension of plain and sphericall triangles after the most exact and com... by Gellibrand, Henry, 1597-1636

A discourse mathematical on the variation of the magneticall needle Together with its admirable diminution lately discovered. By Henry Gellibrand professor of astronomie in Gresham... by Gellibrand, Henry, 1597-1636

An epitome of navigation containing the doctrine of plain and spherical triangles, and their use and application in plain sailing, mercator's sailing, and great circle sailing, as... by Gellibrand, Henry, 1597-1636

Epitomy of navigation Containing plain and easy rules, for the working all plain triangles, and their application to plain, traverse, oblique, Mercator and middle latitude sailing;... by Gellibrand, Henry, 1597-1636

Trigonometria Britanica, or, The doctrine of triangles in two books : the first of which sheweth the construction of the naturall and artificiall sines, tangents and secants, and t... by Newton, John, 1622-1678

Trigonometria Britanica, or, The doctrine of triangles in two books : the first of which sheweth the construction of the naturall and artificiall sines, tangents and secants, and t... by Newton, John, 1622-1678

The strange and dangerous voyage of Captaine Thomas Iames, in his intended discouery of the Northwest Passage into the South Sea VVherein the miseries indured both going, wintering... by James, Thomas, 1593?-1635?

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